Weft selecting apparatus

ABSTRACT

Weft yarn selecting apparatus for use in combination with shuttle-less looms, having a number of weft yarn positions in fixed relation to each other in which means are provided for bringing the positions to a common yarn firing point.

[4 1 July 23, 1974 United States Patent [191 Ormerod WEFT SELECTING APPARATUS [75]. Inventor: Philip Austin Ormerod, Pontypool, Primary Examiner Hemy Jaudon Attorney, Agent, or Firm-Cushman, Darby 7V Cushman England [73] Assignee: Imperial Chemical Industries Limited, London, England June 19, 1972 22 Filed:

21 Appl. No.: 264,401

. Weft yarn selecting apparatus for use in combination [52] U.S. 139/122 W with shuttle-less l ng a nu of w ft yarn [51] Int.

positions in fixed relation to each other in which D03d 47/38 139/122 R, 122 H, 122 W,

means are provided for bringing the positions to a common yarn firing point.

[58] Field of Search.......

6 Claims, 1 Drawing Figure References Cited UNITED STATES PATENTS 3,342,220 Bartosek et 139/122 W 1 WEFT SELECTING APPARATUS The present invention relates to weft yarn selecting apparatus for use in combination with shuttle-less looms, for example, water or air (fluid) jet looms.

According to the present invention there isprovided a weft yarn selecting apparatus having a number of separate weft yarn positions in fixed relation to each other in which means are provided for bringing any one of the positions to a common yarn firing point without the need to first bring an unwanted position to the firing point.

The FIGURE is a perspective view of apparatus embodying the invention.

An apparatus embodying the invention in which four weft yarn positions located at the corners of a square are employed, will now be described by way of example only with reference to the accompanying drawing, in which a suitably profiled cam 1 synchronously connected to the loom mechanism determines the time during which the selection of a yarn position may take place, such selection occurring by movement of one or both of rods X and Y coupled to a conventional loom pattern selector (not shown) as indicated by arrows. A cam follower 3 which bears against the cam under the influence of a spring 5 effects the movement of rocker arms 7 and 7 Responsive to the movement of the rods X and Y are tie bars and push rods 9 and 11 and 9' and 11 respectively which in turn under the influence of the rocker arms transmit movement to the pivoted mounting 13 in which are located four yarn positions a, b, c andd.

Movement of the rocker arms 7 and 7' is carried to the mounting 13 via two shafts 15 and 17 concentrically disposed one within the other. For rocker arm 7 the movement passes to the inner shaft 15 via push rod 11 and bell crank levers l9 and 21 or tie bars 9 and 29 and bell crank lever 21, and from the shaft via pivoted lever 23 and connecting rod 25. For rocker arm 7' a similar movement passes to the outer shaft 17 via push rod 11 and bell crank levers 19 and 21' or tie bars 9 and 29 and bell crank lever 21', but since lever 21' is rigidly secured to the shaft, movement is finally passed to the mounting 13 by direct rotation of the shaft.

Rotatably mounted arms 27 and 27' provide pivots for tie bars 9 and 29 and 9 and 29' respectively. Optionally tie bars 9 and 9 may move under the influence of springs 31 and 31 respectively.

In operation from the position shown and assuming yarn position a to be at the common firing point, in order to move position b to the firing point the cam must first rotate as shown to position A thus disengaging rocker arm 7 from tie bar 9. Then on moving rod X downwards during continued rotation of the cam to position B, further movement of the cam to position C will cause rocker arm 7 to engage with and move push rod 11. Thus by successive movements of parts 11, 19, 21, 15, 23 and the mounting 13 will move so as to bring position b to the firing point previously occupied by position a.

Upward movement of rod X will not be possible until the cam has reached position A again and rocker arm 7 has been disengaged from push rod 11. Such an upward movement will of course cause the return of position a to the firing point once position C on the cam is reached.

Downward movement of rod Y during rotation of the cam from position A to position B will likewise result in movement of the mounting 13 once position C is reached, this time (starting from position a) to bring position d to the firing point. The reverse movement will, as above, return position a to the firing point.

Movement of both rods X and Y together at the appropriate time will cause the mounting .13 to move obliquely or diagonally to bring position 0 to the firing point (from position a) or return position a thereto.

Thus, by moving the rods X and Y either separately or together any of the yarn positions a, b, c or d can be brought directly to the yarn firing point from any other position'without having first to bring an unwanted position to the firing point.

For any movement of the rods X and Y the arm 3 must lie between position A and position B on the cam, since once position B is reached the rocker arms will be ready to engage with tie bars 9 or 9' or push rods 11 or 11'. If tie bars 9 and 9 are in engagement with the rocker arms when position C on the cam is reached, then position a in mounting 13 will be moved into the firing position (as shown). If push rods 11 and 11 are in engagement with the rocker arms when position C on the cam is reached, then position c in mounting 13 will be moved into the firing position.

By combining the invention of the present application with weft yarn measuring apparatus, e.g., as described in copending application Ser'. No. 264,403 filed June 19, 1972 different weft yarns may be supplied to positions a, b, c and d, such as may be provided by fluid jets, which can be moved to a common firing point quickly and efficiently without having first to move through an unwanted position or positions.

I claim:

l. Weft yarn selecting apparatus comprising yarn mounting means having at least three separate yarn positions which are in fixed relation to each other so that upon movement of the mounting means all of the yarn positions move together to bring any one of the yarn positions to a common yarn firing point, and means for moving the mounting means in such a manner that a yarn position at the firing point moves away from the firing point while simultaneously any one of the other positions moves toward the firing position so as to be the next position to occupy the firing point.

2. Apparatus as claimed in claim 1 in which there are four separate weft yarn positions in fixed relation to each other.

3. Apparatus as claimed in claim 2 in which the weft yarn positions are located at the corners of a square.

4. Apparatus as claimed in claim 1 in which the common yarn firing point corresponds with the last selected one of the separate weft yarn positions.

5. Weft yarn selecting apparatus having four weft yarn positions fixed at the corners of a square and means for moving the square to bring any one of the corner positions directly to a common yarn firing point I whereby there is no need to first bring an unwanted position to the firing point.

6. Weft yarn selecting apparatus having at least three separate yarn positions which move together in fixed relation to each other, one of the separate yarn positions corresponding with a common yarn firing point, and means for bringing any one of the other positions directly to the common firing point whereby there is no need to first bring an unwanted position to the firing point. 

1. Weft yarn selecting apparatus comprising yarn mounting means having at least three separate yarn positions which are in fixed relation to each other so that upon movement of the mounting means all of the yarn positions move together to bring any one of the yarn positions to a common yarn firing point, and means for moving the mounting means in such a manner that a yarn position at the firing point moves away from the firing point while simultaneously any one of the other positions moves toward the firing position so as to be the next position to occupy the firing point.
 2. Apparatus as claimed in claim 1 in which there are four separate weft yarn positions in fixed relation to each other.
 3. Apparatus as claimed in claim 2 in which the weft yarn positions are located at the corners of a square.
 4. Apparatus as claimed in claim 1 in which the common yarn firing point corresponds with the last selected one of the separate weft yarn positions.
 5. Weft yarn selecting apparatus having four weft yarn positions fixed at the corners of a square and means for moving the square to bring any one of the corner positions directly to a common yarn firing point whereby there is no need to first bring an unwanted position to the firing point.
 6. Weft yarn selecting apparatus having at least three separate yarn positions which move together in fixed relation to each other, one of the separate yarn positions corresponding with a common yarn firing point, and means for bringing any one of the other positions directly to the common firing point whereby there is no need to first bring an unwanted position to the firing point. 